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Publication numberUS6762670 B1
Publication typeGrant
Application numberUS 10/410,359
Publication dateJul 13, 2004
Filing dateApr 10, 2003
Priority dateApr 10, 2003
Fee statusPaid
Publication number10410359, 410359, US 6762670 B1, US 6762670B1, US-B1-6762670, US6762670 B1, US6762670B1
InventorsChun-Chang Yen
Original AssigneeChun-Chang Yen
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fuse apparatus with explosion-proof structure
US 6762670 B1
Abstract
The present invention relates to a fuse apparatus with explosion-proof structure, which includes a connector connecting with two conductive legs, a fuse mounted on the connector, and a cap covering the connector. The characteristic is to provide a horizontal hole and a vertical aperture in the connector that becomes a T-shape vent passageway at upside-down position. And the connector is provided with two sets of side protrusions, which form a gap between the opening of the horizontal hole of the connector and the cap when the cap covers the connector to release high pressure in the cap when the fuse is accidentally broken. The improved fuse apparatus is safer, since the explosion is prevented.
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Claims(1)
What is claimed is:
1. A fuse apparatus with explosion-proof structure including a connector connecting with two conductive legs, a fuse mounted on the connector, and a cap covering the connector; the characteristic is to provide a horizontal hole and a vertical aperture in the connector that becomes a T-shape vent passageway at up-side-down position, and the connector being provided with two sets of side protrusions, which forms a gap between the opening of the horizontal hole of the connector and the cap when the cap covers on the connector.
Description
BACKGROUND OF THE INVENTION

The present invention refers to a fuse apparatus, which includes an improved structure for preventing an explosion when the fuse is blown out.

As shown in FIGS. 1 and 2, a conventional sub-miniature fuse apparatus includes a connector (1) to connect with two conductive legs (11) for being mounted on an IC board. A fuse (2) is provided on the connector (1) and is contacted with top end of the conductive leg (11). A cap (3) covers the connector (1) and the fuse (2) is sealed therein. As the fuse (2) is broken, there will be occurred an instant high pressure. It is very possible that the cap (3) will explode. The other means on the IC board could be damaged because of this explosion. U.S. Pat. No. 5,287,079, discloses a sub-miniature plastic fuse, which is provided with at least one vent passageway formed in the periphery base extending from top surface of the base to an opening below. Since the vent passageway has a downward opening, dust or other object would be possibly introduced into the fuse, that will affect the effectiveness of the device.

In order to solve this drawback, the present invention mainly provides an improved fuse apparatus, which includes a T-shape vent passageway formed in the connector. The improved vent passageway can release the pressure occurred in the cap, which is then prevented from breakage during explosion.

BRIEF DESCRIPTION OF THE DRAWINGS

The following drawings indicate the character and improvement of the fuse apparatus of the present invention.

FIG. 1 shows an exploded perspective view of a conventional sub-miniature fuse apparatus.

FIG. 2 shows an assembled plan view of the fuse apparatus of FIG. 1.

FIG. 3 shows an exploded perspective view of a fuse apparatus with explosion-proof structure according the present invention.

FIG. 4 shows a top plan view of the fuse apparatus of FIG. 3 being assembled.

FIG. 5 shows a cross-sectional view alone line AA of FIG. 4.

FIG. 6 shows a cross-sectional view alone line BB of FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 3, the present invention includes a connector (1) connecting with two conductive legs (11), a fuse (2) mounted on the connector (1), and a cap (3) covering the connector (1), which is similar to the conventional fuse apparatus and will not be described in detail here and after. The characteristic of the invention is to provide a horizontal hole (12) and a vertical aperture (13) in the connector (1) that becomes a T-shape vent passageway at up-side-down position. The connector (1) is provided with two sets of side protrusions (14), which form a gap between the opening of the horizontal hole (12) of the connector (1) and the cap (3) when the cap (3) covers on the connector (1).

Based on the above structure, if the fuse (2) is occasionally exploded, the high pressure can be released through the vertical aperture (13) and the horizontal hole (12) and then through the gap between the connector (1) and the cap (3). Hence, the cap (3) is prevented from being broken that reaches the objective of the present invention. Meanwhile, dust or other object will not intrude into the connector (1) and affect the effectiveness of the fuse (2) easily.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
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US588686 *May 29, 1896Aug 24, 1897 Electric cut-out
US629663 *Mar 23, 1899Jul 25, 1899Westinghouse Electric & Mfg CoFuse-block for electric circuits.
US1070452 *Oct 31, 1910Aug 19, 1913Westinghouse Electric & Mfg CoFusible cut-out.
US1239876 *Jul 1, 1915Sep 11, 1917George A BurnhamElectric fuse.
US1475558 *May 17, 1921Nov 27, 1923Chicago Fuse Mfg CoFuse plug
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US1907266 *Aug 12, 1930May 2, 1933George MillsCombined electric rotary switch and fuse
US3469047 *Oct 22, 1965Sep 23, 1969Westinghouse Electric CorpCircuit-interrupting devices using activated carbon
US5179436 *Nov 5, 1991Jan 12, 1993Wickmann-Werke GmbhElectric fuse
US5287079 *Nov 9, 1992Feb 15, 1994Cooper Industries, Inc.Sub-miniature plastic fuse
US5783987 *Jun 22, 1995Jul 21, 1998Dynamit Nobel AktiengesellschaftPyrotechnic high-current safety fuse element
US6542063 *Jan 31, 2001Apr 1, 2003Nippon Seisne Cable, Ltd.Electric fuse
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7808362 *Aug 13, 2007Oct 5, 2010Littlefuse, Inc.Moderately hazardous environment fuse
US8576041 *Dec 17, 2008Nov 5, 2013Cooper Technologies CompanyRadial fuse base and assembly
US8674803 *Oct 26, 2009Mar 18, 2014Littelfuse, Inc.Moderately hazardous environment fuse
US20120044038 *Apr 21, 2010Feb 23, 2012Smart Electronics Inc.Small fuse and manufacturing method thereof
US20120133480 *Nov 30, 2010May 31, 2012Chun-Chang YenOverload protection combination structure for a base of a fuse
US20120299692 *Aug 8, 2012Nov 29, 2012Littelfuse, Inc.Fuse providing overcurrent and thermal protection
US20130342305 *Jun 25, 2012Dec 26, 2013Jui-Chih YenStructure of positioning cover of miniature fuse device
Classifications
U.S. Classification337/203, 337/249
International ClassificationH01H85/43, H01H85/00, H01H85/041
Cooperative ClassificationH01H85/0417, H01H85/43, H01H85/0082
European ClassificationH01H85/041B6B, H01H85/43, H01H85/00S3
Legal Events
DateCodeEventDescription
Jul 13, 2011FPAYFee payment
Year of fee payment: 8
Jul 13, 2007FPAYFee payment
Year of fee payment: 4